Cellulose etheryog ib qho polymer semi-synthetic uas tsis yog ionic, uas yog dej-soluble thiab solvent-soluble. Nws muaj ntau yam teebmeem hauv ntau yam lag luam. Piv txwv li, hauv cov ntaub ntawv siv tshuaj lom neeg, nws muaj cov teebmeem sib xyaw ua ke hauv qab no: ① tus neeg sawv cev khaws dej ② thickener ③ leveling khoom ④ zaj duab xis-tsim khoom ⑤ binder; hauv kev lag luam polyvinyl chloride, nws yog emulsifier thiab dispersant; hauv kev lag luam tshuaj, nws yog ib qho binder thiab buffering tus neeg sawv cev Tso cov ntaub ntawv pob txha, thiab lwm yam, vim cellulose muaj ntau yam teebmeem sib xyaw, yog li nws cov teb thov kuj yog qhov dav tshaj plaws. Tom ntej no, kuv yuav tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv cov ntaub ntawv tiv thaiv ib puag ncig.
1. Hauv cov xim latex
Hauv kev lag luam pleev xim latex, yuav tsum xaiv hydroxyethyl cellulose. Cov lus qhia dav dav ntawm viscosity yog RT30000-50000, thiab qhov ntau npaum li cas feem ntau yog li 1.5‰-2‰. Lub luag haujlwm tseem ceeb ntawm hydroxyethyl hauv cov xim latex yog ua kom tuab, tiv thaiv kev sib xyaw ntawm cov xim, pab txhawb kev sib kis, latex, thiab kev ruaj khov ntawm cov xim, thiab ua kom cov viscosity ntawm cov khoom, uas yog qhov pab tau rau kev ua haujlwm ntawm kev tsim kho: hydroxyethyl Ethyl cellulose yooj yim dua rau siv. Nws tuaj yeem yaj hauv dej txias thiab dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi pH. Nws tuaj yeem siv ntawm tus nqi pH ntawm 2 thiab 12. Muaj peb txoj hauv kev siv:
I. Ntxiv ncaj qha rau hauv kev tsim khoom:
Txoj kev no yuav tsum xaiv hom hydroxyethyl cellulose qeeb - hydroxyethyl cellulose nrog lub sijhawm yaj ntau dua 30 feeb. Cov kauj ruam yog raws li nram no: ① Ntxiv ib qho dej ntshiab rau hauv lub thawv uas muaj lub tshuab ua kom nrawm siab ② Pib do tas li ntawm qhov ceev qis, thiab tib lub sijhawm maj mam ntxiv pawg hydroxyethyl rau hauv cov tshuaj kom sib npaug ③Txuas ntxiv do kom txog thaum tag nrho cov khoom siv granular raug ntub ④Ntxiv lwm cov khoom pabcuam thiab cov khoom ntxiv yooj yim, thiab lwm yam. ⑤Do kom txog thaum tag nrho cov pawg hydroxyethyl yaj tag, tom qab ntawd Ntxiv lwm cov khoom hauv cov mis thiab zom kom txog thaum cov khoom tiav.
Ⅱ. Muaj cov cawv txiv hmab rau siv tom qab:
Txoj kev no tuaj yeem xaiv hom tam sim ntawd, thiab muaj cov cellulose tiv thaiv kab mob mildew. Qhov zoo ntawm txoj kev no yog tias nws muaj kev ywj pheej ntau dua thiab tuaj yeem ntxiv ncaj qha rau cov xim latex. Txoj kev npaj yog tib yam li cov kauj ruam ①-④.
III. Npaj nws ua porridge rau siv tom qab:
Vim tias cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (tsis yaj) rau hydroxyethyl, cov kuab tshuaj no tuaj yeem siv los ua cov porridge. Cov kuab tshuaj organic feem ntau siv yog cov kua organic hauv cov xim latex, xws li ethylene glycol, propylene glycol, thiab cov neeg sawv cev tsim zaj duab xis (xws li diethylene glycol butyl acetate). Cov porridge hydroxyethyl cellulose tuaj yeem ntxiv ncaj qha rau hauv cov xim. Txuas ntxiv do kom txog thaum yaj tag.
2. Hauv phab ntsa scraping putty
Tam sim no, feem ntau ntawm cov nroog hauv kuv lub tebchaws, cov putty uas tsis muaj dej thiab tsis yooj yim txhuam tau txais txiaj ntsig zoo los ntawm tib neeg. Nws yog tsim los ntawm acetal reaction ntawm vinyl cawv thiab formaldehyde. Yog li ntawd, cov khoom no maj mam raug tshem tawm los ntawm tib neeg, thiab cov khoom cellulose ether series siv los hloov cov khoom no. Uas yog hais tias, rau kev tsim cov khoom siv hauv tsev uas tsis muaj dej, cellulose tam sim no yog tib yam khoom siv.
Hauv cov putty uas tsis muaj dej, nws muab faib ua ob hom: hmoov qhuav putty thiab putty paste. Ntawm ob hom putty no, hydroxypropyl methylcellulose feem ntau raug xaiv, thiab qhov viscosity specification feem ntau yog ntawm 80,000-90,000. Lub luag haujlwm yog khaws dej, sib txuas, lubrication thiab lwm yam.
Vim tias cov qauv putty ntawm ntau lub tuam txhab tsim khoom sib txawv, qee qhov yog grey calcium, lub teeb calcium, dawb cement, thiab lwm yam, thiab qee qhov yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li cov lus qhia, viscosity thiab kev nkag mus ntawm cellulose hauv ob hom qauv kuj sib txawv. Tus nqi ntxiv yog li 3‰-5‰.
Thaum tsim cov phab ntsa putty scraping, txij li thaum lub hauv paus ntawm phab ntsa muaj qee qib ntawm kev nqus dej (qhov nqus dej ntawm phab ntsa cib yog 13%, thiab qhov nqus dej ntawm cov pob zeb yog 3-5%), ua ke nrog kev ua pa ntawm lub ntiaj teb sab nraud, yog tias cov putty poob dej sai dhau, Nws yuav ua rau muaj kev tawg lossis tshem tawm hmoov, uas yuav ua rau lub zog ntawm cov putty tsis muaj zog. Yog li ntawd, ntxiv cellulose ether yuav daws qhov teeb meem no. Tab sis qhov zoo ntawm cov khoom sau, tshwj xeeb tshaj yog qhov zoo ntawm cov tshauv calcium kuj tseem ceeb heev. Vim yog qhov siab ntawm cellulose, qhov buoyancy ntawm cov putty kuj tau txhim kho, thiab qhov tshwm sim sagging thaum lub sijhawm tsim kho kuj raug zam, thiab nws yooj yim dua thiab txuag zog tom qab scraping.
3. Cov pob zeb ua vaj tse
Hauv cov pob zeb ua vaj tse, kom ua tiav qhov muaj zog tshaj plaws, cov cement yuav tsum tau hydrated tag nrho. Tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj sov kev tsim kho, cov pob zeb ua vaj tse poob dej sai dhau, thiab cov kev ntsuas ntawm kev hydration tag nrho yog siv los tswj thiab sprinkle dej. Pov tseg cov peev txheej thiab kev ua haujlwm tsis yooj yim. Qhov tseem ceeb yog tias cov dej tsuas yog nyob rau ntawm qhov chaw, thiab cov dej sab hauv tseem tsis tiav. Yog li ntawd, qhov kev daws teeb meem rau qhov teeb meem no yog ntxiv hydroxypropyl methylcellulose ntawm 150,000 thiab 200,000 rau cov pob zeb ua vaj tse. , qhov ntxiv yog li 2‰-3‰, thiab tus nqi khaws dej tuaj yeem nce mus txog ntau dua 92%. Txoj kev siv hauv cov pob zeb ua vaj tse yog ntxiv dej tom qab cov hmoov qhuav sib xyaw sib npaug.
4. Hauv kev siv plastering gypsum, kev sib txuas gypsum, caulking gypsum
Nrog rau kev txhim kho sai ntawm kev lag luam kev tsim kho, tib neeg qhov kev xav tau cov ntaub ntawv tsim kho tshiab kuj nce ntxiv txhua hnub. Vim yog kev nce ntxiv ntawm tib neeg txoj kev paub txog kev tiv thaiv ib puag ncig thiab kev txhim kho tas mus li ntawm kev ua haujlwm ntawm kev tsim kho, cov khoom siv cementitious gypsum tau tsim kho sai. Tam sim no, cov khoom siv gypsum feem ntau yog plastering gypsum, bonded gypsum, inlaid gypsum, thiab vuas nplaum.
Cov nplaum gypsum yog cov khoom siv nplaum zoo rau phab ntsa sab hauv thiab qab nthab. Qhov saum npoo ntawm phab ntsa uas nplaum nrog nws yog qhov zoo thiab du, tsis poob hmoov, ruaj khov rau hauv paus, tsis muaj kev tawg thiab poob tawm, thiab muaj lub luag haujlwm tiv taus hluav taws; cov nplaum gypsum yog ib hom tshiab ntawm cov nplaum teeb pom kev zoo hauv tsev yog cov khoom siv nplaum ua los ntawm gypsum ua cov khoom siv hauv paus thiab ntxiv ntau yam khoom ntxiv. Nws yog qhov tsim nyog rau kev sib txuas ntawm ntau yam khoom siv phab ntsa hauv tsev inorganic. Nws tsis muaj tshuaj lom, tsis muaj saj, Cov yam ntxwv xws li lub zog thaum ntxov, teeb tsa sai, thiab kev sib txuas ruaj khov, nws yog cov khoom siv txhawb nqa rau cov vaj huam sib luag tsev thiab kev tsim kho thaiv; tus neeg sawv cev gypsum caulking yog qhov sib txawv ntawm cov vaj huam sib luag gypsum thiab kho cov phab ntsa thiab kab nrib pleb.
Cov khoom gypsum no muaj ntau yam haujlwm sib txawv. Ntxiv rau lub luag haujlwm ntawm gypsum thiab cov khoom siv ntxiv, qhov teeb meem tseem ceeb yog tias cov cellulose ether additives ntxiv ua lub luag haujlwm tseem ceeb. Vim tias gypsum raug faib ua anhydrous gypsum thiab hemihydrate gypsum, gypsum sib txawv muaj cov teebmeem sib txawv rau kev ua haujlwm ntawm cov khoom, yog li thickening, dej khaws cia thiab retardation txiav txim siab qhov zoo ntawm gypsum tsev cov ntaub ntawv. Qhov teeb meem feem ntau ntawm cov ntaub ntawv no yog hollowing thiab tawg, thiab lub zog pib tsis tuaj yeem ncav cuag. Txhawm rau daws qhov teeb meem no, nws yog xaiv hom cellulose thiab cov txheej txheem siv cov khoom sib xyaw ntawm retarder. Hauv qhov no, methyl lossis hydroxypropyl methyl 30000 feem ntau raug xaiv. -60000, qhov ntxiv yog ntawm 1.5‰ -2‰, thiab cellulose tsom mus rau kev khaws cia dej thiab retarding lubrication.
Txawm li cas los xij, nws tsis yooj yim sua kom cia siab rau cellulose ether ua tus retarder, thiab nws yog qhov tsim nyog los ntxiv citric acid retarder kom sib tov thiab siv yam tsis cuam tshuam rau lub zog pib.
Feem ntau, kev khaws dej yog hais txog pes tsawg dej yuav poob ntawm nws tus kheej yog tias nws tsis nqus dej los ntawm sab nraud. Yog tias phab ntsa qhuav dhau, kev nqus dej thiab kev ua pa ntawm lub hauv paus yuav ua rau cov khoom poob dej sai dhau, thiab yuav muaj qhov khoob thiab tawg.
Txoj kev siv no yog sib xyaw nrog hmoov qhuav. Yog tias koj npaj cov tshuaj, thov saib txoj kev npaj cov tshuaj.
5. Cov tshuaj nplaum rwb thaiv tsev
Cov tshuaj nplaum rwb thaiv tsev yog ib hom khoom siv rwb thaiv tsev tshiab hauv thaj tsam sab qaum teb. Nws yog cov khoom siv phab ntsa uas tau tsim los ntawm cov khoom siv rwb thaiv tsev, tshuaj nplaum thiab cov khoom sib txuas. Hauv cov khoom siv no, cellulose ua lub luag haujlwm tseem ceeb hauv kev sib txuas thiab ua kom muaj zog. Feem ntau xaiv methyl cellulose nrog viscosity siab (kwv yees li 150,000), qhov ntau npaum li cas feem ntau yog ntawm 2‰-3‰), thiab txoj kev siv yog sib tov hmoov qhuav.
6. Tus neeg sawv cev sib txuas lus
Tus neeg sawv cev sib txuas yuav tsum yog HPNC20000, thiab cov nplaum rau pobzeb yuav tsum ntau dua 100,000. Tus neeg sawv cev sib txuas yuav tsum siv ua cov khoom ua kom tuab, uas tuaj yeem txhim kho lub zog tensile thiab lub zog tiv thaiv xub.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2024